Can this adapter be used on a PC and Dell monitor?

I just purchased a Dell Ultra Sharp 32" monitor and it only has hdmi and displayport output. My PC computer's graphic card has DVI. I want to get the 2560x1600 resolution and I thought this cable would work. I connected the mini displayport to the monitor, USB to the computer and the DVI port to the graphics card. I can't get it to work. The monitor says mini displayport not active even after turning on computer. Thanks.